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Consolidated Statements of Operations - USD ($)
$ in Thousands
 12 Months Ended
Dec. 31, 2015
Dec. 31, 2014
Property and joint venture revenue    
Joint venture property payments $ 200
Costs, expenses and other:    
Exploration expense $ 89 279
Depreciation and amortization 11 13
General and administrative 1,965 2,176
Gain on derivative instruments $ (84) (39)
Property abandonment and impairment 20
Gain on sale of assets $ (7) (1)
Interest expense and dividend income (net) (12) (1)
Total costs, expenses and other 1,962 2,447
Other (expense) income    
(Loss) gain on sale of marketable equity securities (969) 472
Gain on warrant liability $ 51 85
Equity in net loss of equity method investment (153)
Total other (expense) income $ (918) 404
Loss before income tax (2,880) $ (1,843)
Income tax expense (560)
Loss from continuing operations (3,440) $ (1,843)
Gain on sale of discontinued operations 12,309
Net income (loss) 8,869 $ (1,843)
Loss attributable to noncontrolling interest 3 10
Net income (loss) attributable to Solitario shareholders $ 8,872 $ (1,833)
Income (loss) per common share attributable to Solitario shareholders basic and diluted    
Continuing operations $ (0.09) $ (0.05)
Discontinued operations 0.31
Net income (loss) $ 0.23 $ (0.05)
Weighted average shares outstanding:    
Basic and diluted 39,287 38,967